Stir vanilla into sour cream; set aside.,Combine brown sugar, cinnamon, nuts and cherries in small bowl and set aside.,Cream margarine and regular sugar until light; add eggs and beat until light.,______,Put 1/2 batter in greased Bundt pan or 10-inch tube pan.,Sprinkle 1/2 of nut and cinnamon, etc.,mixture on top of batter.,Layer rest of batter mixture and nut mixture.,Bake at 350° for 45 to 50 minutes.,For best results have eggs and sour cream at room temperature.